Tube rolling mill



June 4, 1935. K. A. NYGREN Er AL 2,003,551

TUBE ROLLING MILL Filed April l0, 1953 5 Sheets-Sheet l 515, EW]- y I NVENTOR.

ATTORNEY? VENTOR.

5 Sheets-Sheet 2 ad@ Q Wm ATTORNEY;

June 4, 1935. K, A. NYGREN 'Er AL TU BE ROLLING MILL Filed April lO.1935 June 4 1935- K. A. NYGREN ET Al. 2,003,551

TUBE ROLLING MILL F'ld April l0, 1935 3 Sheets-Sheet, 3 i 55 Y I E l/.5/ I 0 J@ l j f '/f/ i /j i /0 /0 E /0 y //g r i 1 L f@ f/ j? v ill l5% i *A INVNTORQ ATTORNEYS j?? I 4 PZ Mind-wub L 727 I 5 57 PatentedJune 4, 1935 vUNITED STATES PATENT OFFICE Milwaukee,

assignors to Globe Steel Wis., Tubes Co., Milwaukee, Wis., a corporationof Delaware Application Aprn 1o, 1933, sqm Nn. 665,358 4 calms. (c1.ssi- 11) A This invention relates to a tube rolling mill capable ofadvantageous use as a reducing mill although also capable of variousother tube rolling operations.

Among the objects of the invention are to provide a tube rolling millwherein the rolls are so mounted, organized and driven as to provide acompact, eicient and durable structure and as to be-capable of easilycontrolled adjustment whereby to vary the reduction effected by any setof rolls or to take up for wear or to throw in or out of action any rollstand, that is, any particular set of cooperable rolls.

Another object is to provide a-novel form of driving mechanism for therolls which, while simple and durable and compactly and closelyorganized, is highly eiiicient in operation and insures the driving ofthe rolls of each set at a synchronous speed.

Other objects and advantages reside in certain novel features of theconstruction, arrangement and combination of parts which will behereinafter more fully described and particularly pointed out in theappended claims, reference being made to the accompanying drawings,forming a part of this speciilcation, and in which:

Figure 1V is a diagrammatic view in side elevation illustrating aplurality o roll stands or units embodying the present invention andcorelated for a tube rolling operation;

Figure 2 is a view in elevation showing one of the roll stands as viewedfrom line 2-2 of Figure l, with parts broken away and shown in sectionfor the sake oi.' illustration;

Figure 3 is a view in longitudinal section taken on line 3-3 of Figure2;

Figure 4 is a deatil view in section taken on 'line 4--4 of Figure 2;,"Figureisaviewinsectiontaken on line'i-E .40 of Figure 4;

Figure 6 is a sectional view taken on line 6-8 of Figure 5; Figure 7 isa sectional view taken on line 'I-1 of Figure 4; and v 8 is afragmentary view showing a portion of the housing in transverse crosssection.

Referring to the drawings, it will be seen that the rolling millcomprises a plurality of rolling units designated generally at U, all ofidentical construction, and mounted upon a common bed B. Each rollingunit comprises a frame or housing designated generally at I and made upoi' a 'main i'rame plate 2 vertically disposed and extendingtransversely between the rails 2 oi the bed, the frame or housing havingsupporting shoes 4 integral therewith, interengaged with the members 3and releasably secured thereto by bolts and nuts 5. An annular ange 6 isintegral with or otherwise suitably connected to the plate 2 and to this:Gange and to the plate 2 a removable side plate 'Iis secured by boltsand nuts 8 (see Figure 8). Eyes 9 are secured to webs or extension 6'integral with the frame or housing' I and are adapted Yto coact withhooks of hoistl0 ing chains or tackle to facilitate handling andpositioning oi' the unit.

Associated with each frame I and cover plate 'I are'fou'r rolls Ill, therolls being arranged in sets with the members of each set symmetrically15 disposed with respect to their common plane and with one pairdisposed at proper angles to the other as clearly illustrated in Figure2. Each roll I0 is securely iixed to the outer end of a roll spindle II.Each spindle Il is supported 20 for rotation in a roller bearingassembly I2 and a ball bearing assembly I3 (see Figures 3.and 5), theassemblies I2 and I3 of each roll spindle being supported within abearing housing Il and l being so constituted as to prevent axialshifting 25 of their roll spindle with respect to their bearing housingwhile yproviding for free rotation of the spindle.

Each bearing housing I4 is provided with a pair of cppositely extendingangular anges I5 30 extending longitudinally thereof and slidablyintertted with channels or grooves I6 provided on the forward end of aslide or mounting block I1 (see Figures 2, 4, 5 and 7). This adjustableintertting of the bearing housing of eachiroll 35 spindle with its slideblock provides for adjustment of each roll longitudinally of its axisand such adjustment may be controlled and eilected by any suitable meansas, for example, by means of an adjusting bolt or screw I8 extending 40through apertured lugs I9 integral with the slide block Il and having athreaded portion 2l engaged with a nut 2l integral with its bearinghousing I4. The head of the bolt I8 engages one of the lugs I9 and a nut22 is threaded on the 45 other end o! the bolt and engages the other lugI9 to secure the parts in adjusted position. Each slide I1 is made up oiside walls 2i connected by anV integral vcentrally disposed cross member26 having a forwardv extension 21 in 50' which the lower channel I6 isformed. A cooperable removable section 28 is b olted to the extension 21as indicated at 29 and provides the structure in which the upper channelI8 is formed. The side walls 2i have longitudinally extending guide ribs30 projecting outwardly therefrom and slidably interiitting inguide-ways 3| formed in the side members 32 of a bracket designatedgenerally at 33 and securely bolted as at 34 to the main frame plate 2and 1. Flanged lugs 35 integral with the side members of the bracketengage fiush against and are bolted to abutments lugs 36 which may beformed integral with the main frame plate 2 and 1 (see Figures 2 and 5).Wear plates 31 and 38 may be interposed between the bracket 32 and theside walls and guide ribs of the slide (see Figure 6).

The central cross member 26 of each slide is provided with 'a verticalslot 40 extending up through the top thereof and intersected bylongitudinal openings 4|formed in the cross member. A notched plate 42is fitted down in the slot 40 and embraces an adjusting screw 43; Theopposite sides of the plate engage the confronting faces of collars 44integral with or suitably secured to the adjusting screw 43. Thethreaded portion 45 of the screw 43 is engaged with a nut or threadedbearing 46 formed integral with the bracket 33. To facilitate adjustmentof the screws, the rearward end of each issquared or otherwise adaptedas indicated at 41 to coact with a suitable tool. A nut 46 is threadedon each threaded portion 45`and secures it in adjusted position.

By adjusting each screw 43 the slide |1 interconnected therewith ismoved longitudinally in its guides and in such manner as to adjust theassociated roll in the roll plane or toward and away from its cooperableor companion roll. In this way the size of the roll pass is varied, andalso provision is made for the taking up of wear as well as for thethrowinginto and out of action of the rolls of any roll stand or rollingmill unit.

Each roll spindle has the end thereof remote from its roll projectingbeyond its bearing housing and connected by a removable and universalcou- Illing 50 with the adjacent end of a drive shaft 5 I. Split collars52 which have their sections detachably connected by bolts and nuts orthe like embrace the end of each drive shaft 5| adjacent its coupling 50and although normallyV maintaining the coupling assembled with its driveshaft and roll spindle also provides for the disconnec-J tion of thecoupling upon its removal. Each drive shaft 5| is rotatably mounted inbearings 53 provided therefor in a gear box or casing 54 interconnectedwith and securely bolted to the main -A frame plate 2 and 1. Beveledgearing 55 connects each drive shaft 5| to a pinion shaft 56 journaledin bearings 51 proyided therefor in the gear box 54. Each pinion shaft56 extends transversely of the main frame or housing at a point adjacentthe periphery thereof. Pinions 60 are fixed on the pinion shafts 56 andmesh with a master gear 6|, the-hub of which is rotatably mounted onroller bearings 62 carried by the hub or annular central structure 63 ofthe mainframe or housing #2.

The master gear 6| of each rolling mill unit is driven from an`individual gear unit shown diagrammatically at 65 in Figure 2, the gearunit shaft being coupled to a drive line'shaft 66 connectedby beveledgearing 61 to a main driving shaft 68 which has a pinion 69 thereonmeshing with and driving the master gear 6|.

In practice, the rolls being independently adjustable in theirrespective roll planes may be readily set to provide the desired passopening and th's vary the reduction effected by any-set of rolls. Thissame feature provides the takeup required for'wear and makes it possibleto throw in or out of action any particular roll stand or rolling unit.By removing any collar 52 the loose coupling element 50 may be movedoutwardly out of engagement with the free end of its roll spindle Il, sothat by removing the fastening means which holds the bracket 33 to themain frame plate, the bracket, its slide and the associated roll, rollspindle and bearing may be independently removed from the set. The rollsare also independently adjustable along their respective axes so as tofacilitate alinement or symmetrical disposition of the members of eachset of rolls with respect to their common plane. The driving means forthe rolls is compactly and closely organized and while simple anddurable in construction, is efficient in operation and insures rotationof the rolls of each set at the same speed.

While we have shown and described one construction in which theinvention may be embodied, it is to be understood that various changesin the size, shape and arrangement of the parts may be made withoutdeparting from the spirit of the invention or the scope of thesubjoinedclaims.

'I'he invention claimed is:

1. A rolling mill comprising a single main housing having gear boxesextending laterally therefrom adjacent its periphery, a passage-wayextending centrally through said housing for accommodation of materialto be rolled, drive shafts carried by the gear boxes and extendingtoward the longitudinal axis of said passage-way and radially thereof,gearing within said housing and gear boxes for driving said shafts, aplurality of radial disposed rolls adapted for conjoint rolling actionon material passing through said passage-way, means slidablyinterconnecting said rolls and the outside of said housing, said meansrotatably supporting said rolls and providing for individual transverseand axial adjustment thereof while'maintaining said rolls with theirrotational axis lying in a common plane and flexible driving connectionsbetween said rolls and said driving shafts, said means, rolls andflexible driving connections being positioned within the confines denedby the face of the housing and the common plane of the outer faces ofsaid gear boxes.-

2. In a rolling mill having a housing for roll driving means andradially deposed rolls outside of said housing positioned for conjointrolling action on material passing perpendicularly to and centrallythrough said housing, means for supporting said rolls and providing forindividual adjustment thereof while maintaining said rolls with theirrotational axis lying in a common plane comprising intermediate members.

slidably interconnected said housing for movement back and forth in oneline of direction only, bearingmembers' slidably interconnected with oneend of said intermediate members and positioned between vthe outerconiines of said intermediate members and the housing, the slidingmovement of said bearing members being back and forth in one line ofdirection only, said latter line of direction being transverse of saidformer line of direction and spindles rotatably' supported against axialdisplacement by said bearing members, said spindles having one endiixedly supporting one of said rolls and the other end exibly connectedwith driving means.

3. 'I'he invention set forth in claim 2, characterized by single screwmeans between said intermediate members and said housing and singlescrew means between said intermediate mem- 5 bers and said bearingmembers whereby all of said members are adjusted relative to each otherand to said housing.

4t The invention set forth in claim 2, characterized in that theintermediate members have at one end `a lower protruding jaw and adetachable piece providing a complementary upper protruding jaw securedto said lower jaw by screw means, said jaws sldably interconnecting withthe bearing members.

KARL A. NYGREN.

JOHANNES A. ZSCHJESCI-IE.

